Hi, I have this problem with two devices: modem GSM (after disconnection and power off) and Ethernet device (usb0).
I cannot find a way to debug this, I set the NM debug mode with: sudo dbus-send --system --print-reply --dest=org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager.SetLogging string:"debug" string:"" But I still don't see any reason. For the Modem: Jan 09 15:17:57 D130102 NetworkManager[246]: <info> [1515511077.4440] (cdc-wdm0): modem state changed, 'disabled' --> 'enabling' (reason: user-requested) Jan 09 15:17:57 D130102 NetworkManager[246]: <debug> [1515511077.4446] device[0x79c940] (cdc-wdm0): add_pending_action (1): 'recheck-available' Jan 09 15:17:57 D130102 NetworkManager[246]: <debug> [1515511077.4558] device[0x79c940] (cdc-wdm0): remove_pending_action (0): 'recheck-available' Jan 09 15:17:57 D130102 NetworkManager[246]: <info> [1515511077.5026] (cdc-wdm0): modem state changed, 'enabling' --> 'disabled' (reason: unknown) Jan 09 15:17:57 D130102 NetworkManager[246]: <debug> [1515511077.5031] device[0x79c940] (cdc-wdm0): add_pending_action (1): 'recheck-available' Jan 09 15:17:57 D130102 NetworkManager[246]: <debug> [1515511077.5040] device[0x79c940] (cdc-wdm0): remove_pending_action (0): 'recheck-available' Jan 09 15:17:59 D130102 NetworkManager[246]: <debug> [1515511079.7748] ++ connection 'replace-and-commit-disk' (0x7c1050/NMSimpleConnection < 0x719078/NMSKeyfileConnection): Jan 09 15:17:59 D130102 NetworkManager[246]: <debug> [1515511079.7804] ++ connection [ 0x7a1c78 < 0x6f6e18 ] Jan 09 15:17:59 D130102 NetworkManager[246]: <debug> [1515511079.7819] ++ connection.autoconnect < FALSE Jan 09 15:17:59 D130102 NetworkManager[246]: <debug> [1515511079.8245] settings-connection[0x719078,baa2af1b-e21e-7bcf-f1ac-1a775c46ddc3]: replace settings from connection 0x7c1050 (ModemGSM) Jan 09 15:17:59 D130102 NetworkManager[246]: <info> [1515511079.9239] keyfile: update /etc/NetworkManager/system-connections/ModemGSM (baa2af1b-e21e-7bcf-f1ac-1a775c46ddc3,"ModemGSM") Jan 09 15:17:59 D130102 NetworkManager[246]: <debug> [1515511079.9557] Saving secrets for connection /org/freedesktop/NetworkManager/Settings/1 (ModemGSM) Jan 09 15:17:59 D130102 NetworkManager[246]: <info> [1515511079.9678] audit: op="connection-update" uuid="baa2af1b-e21e-7bcf-f1ac-1a775c46ddc3" name="ModemGSM" args="connection.autoconnect" pid=1754 uid=0 result="success" Jan 09 15:18:01 D130102 NetworkManager[246]: <debug> [1515511081.0742] active-connection[0x6f9710]: set device "cdc-wdm0" [0x79c940] Jan 09 15:18:01 D130102 NetworkManager[246]: <debug> [1515511081.0794] device[0x79c940] (cdc-wdm0): add_pending_action (1): 'activation-0x6f9710' Jan 09 15:18:01 D130102 NetworkManager[246]: <debug> [1515511081.1226] active-connection[0x6f9710]: constructed (NMActRequest, version-id 79) Jan 09 15:18:01 D130102 NetworkManager[246]: <info> [1515511081.1276] audit: op="connection-activate" uuid="baa2af1b-e21e-7bcf-f1ac-1a775c46ddc3" name="ModemGSM" pid=1754 uid=0 result="fail" reason="Connection 'ModemGSM' is not available on the device cdc-wdm0 at this time." Jan 09 15:18:01 D130102 NetworkManager[246]: <debug> [1515511081.1280] manager: Failed to activate 'ModemGSM': Connection 'ModemGSM' is not available on the device cdc-wdm0 at this time. For the usb0: Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.1080] agent-manager: req[0x744dd8, :1.47/nmcli-connect/0]: requesting permissions Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.1095] agent-manager: req[0x744dd8, :1.47/nmcli-connect/0]: agent registered Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.1109] policy: re-enabling autoconnect for all connections with failed secrets Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.1864] active-connection[0x6f9668]: set device "usb0" [0x734708] Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.1921] device[0x734708] (usb0): add_pending_action (1): 'activation-0x6f9668' Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.2201] active-connection[0x6f9668]: constructed (NMActRequest, version-id 80) Jan 09 15:26:09 D130102 NetworkManager[246]: <info> [1515511569.2430] audit: op="connection-activate" uuid="66d1285e-9905-4991-99c8-25fa3b3aa08a" name="UsbHost" pid=1873 uid=0 result="fail" reason="Connection 'UsbHost' is not available on the device usb0 at this time." Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.2485] manager: Failed to activate 'UsbHost': Connection 'UsbHost' is not available on the device usb0 at this time. Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.2489] active-connection[0x6f9668]: set state deactivating (was unknown) Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.2493] active-connection[0x6f9668]: check-master-ready: not signalling (state deactivating, no master) Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.2496] device[0x734708] (usb0): remove_pending_action (0): 'activation-0x6f9668' Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.2500] active-connection[0x6f9668]: set state deactivated (was deactivating) Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.2504] active-connection[0x6f9668]: check-master-ready: not signalling (state deactivated, no master) Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.2569] active-connection[0x6f9668]: disposing Jan 09 15:26:09 D130102 NetworkManager[246]: <debug> [1515511569.3988] agent-manager: req[0x744dd8, :1.47/nmcli-connect/0]: agent unregistered or disappeared Is there a way to see what is happening? Am I missing to do something?
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